<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>行内块元素中间有缝隙</title>
    <style>
        div {
            float: left;
            width: 150px;
            height: 200px;
            background-color: aqua;
        }
    </style>
</head>
<body>
    <div>1</div>
    <div>2</div>
    <div>3</div>
    <img src="img/浮动实现方法.png" alt="">
</body>
</html>